Grinding, smoothing, and polishing apparatus



Aug. 16, 1932.

c. HEUZE 1 1,871,992

GRINDING,- SMOOTHING, AND POLISHING APPARATUS Filed March 4. 1931 2 Sheets-Shet 1 7 I 8 26 11 Fig.1

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GRINDI'JNG, SMOOTHING, AND POLISHING APPARATUS Filed March 4, 1931 30 tion,

Patented Aug. 16, 1932 UNITED STATES- PA'TEN CHARLES HEUZE, or 'AUVELAIS, BELGIUM GRINDING, SMOOTHING, AND POLISHING APPARATUS Application filed March 4, 1931, Serial No.

10.. sating the wear of the tool, by means of the variable action of a weight. In these devices the variation of the reaction of the weight on the tool is obtained by varying the amount of the weight. These devices have the disadvantage that numerous partial weights are employed to compensate the wear of the tool in a manner which is ap-- proximately progressive.

To avoid this inconvenience, the invention provides that the intensity of the reaction of the weight on the tool varies by making said weight to slide along a lever connected with the shaft of the tool and pivoting round a point of support fixed to the beam.

In order to maintain said lever approximately horizontal toeallow the use of large leverages and therefore the use. of light weights which give a very exact compensahe invention provides to mount said lever on a pivot of variable height in respect to the tables. According to one embodiment of the invention, said pivot is fixed on the beam and the latter is carried by supports, a the height of which can be varied. According to another embodiment of the invention, said pivot is fixed on a sleeve of which the height can be varied in respect to the beam which carries it.

To. facilitate the control of the wear of the tool, the invention also provides the 'disposal of abutments oneither side of the lever which carries the Weight. g

In order to obtain the automatic displacement of the weight according to the wear of the tool, the invention provides to mount said abutments on an arm which swivels on a pivot carried by the same part as that which carries said lever, said arm controlling by means of its oscillations. the passage -ment by Said tool, in the T OFFICEZIS 520,078,'and'in Belgium March 31, 1930.

s i of motive power towards a motor, inter; ed to drive the device which displacesf he Velght. a v v 7 QT The invention also provides that th pparatus' presents between the device hitin controls the regulation of the height ot tge A t f pivot of the lever which carries the l and that which controls the displacemenp the weight on said lever, a mechanic onnection such that the lowering of the p corresponding to a predetermined a" aunt of wear of the tool, causes the weighttype displaced, so that theivariation in the ,;rection exerted by sameon the shaft of theg t obl,

is equal to the loss of weight of the togl dusitm to said wean-e However in order to regulate the 0, ithe of the beam according to the thickness object to be worked, without altering position of the weight, the invention proy des that a disengaging member be'arr'an above named mechanical-connection. Further details and characteristics gthe invention will appear in the course of thgdescription of the drawings annexed toQthiQ specification, which show in perspectivelgorne embodiments of the invention.

Figure 1 shows an apparatus according'to the invention, partly broken away an ith a cross section of the tool and of the tahl which carries a plate, of glass under treatcase where the 'lever carrying the weight ismounted on the bgam which has adjustable supports.

Figure 2 scale. 7

Figure 3 shows a variety of the dev'i" 'lto regulate the height of the beam supports, in section and partlybroken away. {i w Figure 4 shows an apparatus accor -ipgito the invention, partly broken away, in theiclase where the lever carrying the weight is mountshows part of Fig. 1 on a v iePE ed on a sleeve of adjustable height in .rs p ect to the beam whose height is fixed. 5 A

Figure 5 shows part of Figure 4 on a l' t'i'iiei scale. i i

These figures show a table 2 which eiho ves on guides 3 in the direction of the arrdiWX. This table carries a sheet of glass 4: tr@ ted by a tool 5. The latter is carried by a beat 6.

The shaft 5a of the tool 5 is connected to a lever 7 by means of the knife-edges 5b. This lever 7 pivots on the knife-edges 6a carried by the beam 6. On the lever 7 a weight 8 is supported, which can be displaced lengthwise on this lever. This displacement may be effected by a fork 9 fixed to a nut 9a engaging a screwed rod 10 which may be turned for instance by a handwheel 11.

The rotation of the screwed rod 10 may also be effected by an electric motor 12, by means of a mechanical connection made between the shaft 12a of said motor and the screwed rod 10. This mechanical connection may consist for instance of a chain 13 passing over toothed wheels 14 and 15. The wheel 14: is keyed on the shaft of the electric motor 12 whereas the wheel 15 is loose on the screwed v 2 rod 10, but may be connected angularly to the latter by means of a coupling sleeve 16 sliding on said rod 1n an axial CllIeCtlOIl, whilst remaining keyed on this rod in an angular direction. I

The beam 6 rests at its ends on supports adjustable in height. These supports may be for instance inclined planes 17 on which rest trucks 18 immovable in respect to the beam in a vertical direction.

These trucks 18 may bedisplaced in the direction 'of the slope of the inclined planes 17. This displacement may be made for instance simultaneously for the trucks arranged at'opposite ends. by engaging nuts 18a fixed to the trucks with screwed rods 19 whose opposite ends are screwed. in opposite'directions,

said screwed rods 19 being arranged to rotate. This rotation may for instance be effected by the electric motor 12, by means of gear wheels 20, 21 and 22. In case the electric current should fail. the rotation may be effected by hand with a handwheel 23 keyed upon one of the screwed rods 19. I

By this means, according to the direction in which the screwed rods 19 are turned. the

beam 6 may be raised or lowered in respect to the table 2. During these displacements, the beam 6 is guided vertically'by guides 17 a integralwith the supports pro ided with. the

inclined planes 17. Grooves 17 7 are provided" in these vertical guides 17a to allow of the displacement of the ends of the screwed rods ers 24 so as to be capable of being movedwith the beam carried the supports, in a trans verse direction to that of the arrow X by means of any known mechanism, not shown.

When the tool 5 wears its shaft 5a descends in respect to the beam 6, and causes the lever 7 to pivot round the knife-edges 6a in a clockwise direction. By this pivoting,

one web 7 a of the lever 7 approaches one of the two abutment-s 25 consisting of screws,

whose position may be regulated in respect suitable direction, to lower the beam 6 until the tool 5 by contacting with the plate of glass, causes the lever 7 to pivot in the anticlockwise direction and brings back the web 764 towards the other of the two abutments 25.

Themechanical connection between the device which causes the vertical movement of the beam 6 and the one which displaces the weight 8 along the lever 7 is suchthat any lowering of the beam corresponding to a rcduction in the thickness of the tool 5 causes a displacement of the weight so that the variation-of the reaction on the tool 5 be equal to the variation in the weight of sald tool due to said reduction in the thickness of same.

In order to effect these motions automatically, the invention also provides that the displacements of the oscillating arm 26, in respect to the meeting of the web 7a with one or other of the abutments 25, may be used to control the passage of motive power towards a motorintended to actuate the device which causes the weight to be displaced and the device which causes the displacement of the beam in height.- In the case shown, the oscillating arm 26 may be used to establish an electric contact with one or the other of the contacts 27. The latter are inserted in the feed circuit of the electric motor 12. Accord ing to the contact with which the oscillating arm 26 is in touch, said motor turns in one direction or the other.

When the beam 6 is to be displaced in height without displacing the weight 8, so as to be able to regulate the height of said beam according to the height of the glass plate 1 under treatment, the sleeve 16 is disengaged so that the rotation of the toothed wheel 15 does not cause the screwed rod 10 to rotate.

To avoid any exaggerated oscillation of the lever 7 when the beam 6 is raised, the invention provides the arrangement of said lever between fixed stops such as 28.

According to the invention, the apparatus allows a small distance to be maintained between the lower part of the beam and the tool 5. It allows the sliding of the shaft 5:1 to be reduced to a minimum in case the tool is agrinding tool. If this tool is a polishing tool the sliding may be completely suspended.

The fact that the height of the beam can be regulated allows large leverages to be used for the lever 7 and consequently the use of light weights 8, which gives a very exact compensation.

According to the invention, the apparatus also allows the thickness of the'glass plates 4' to be very easily fixed, since it suflices to note the position of the fork 9 and of the trucks 18 respectively on a graduation of the lever 7 and-a graduation of the beam 6, and to utilize the figures noted, to fix the thickness of the glass by means of a table.

According tothe embodiment shown in Figure 3, the regulation of the height'of the beam 6 may be obtained by gearing a worm 1'2?)- carried by the shaft 12a of the motor 12 with a wormwheel 29 fixed on a nut 29a screwed on to a threaded column 30. The latter is mounted on a baseplate 31 by means of a pivot 31a.

According to the embodiment shown in Figures 4 and 5, the height of the beams can- V This head 50? can rest on a collar 32a of the sleeve 32. Onthe latter anut 33 engages, fixed to the beam height and able to turn at-the same time as a worm wheel 34 which gears with a worm 35a mounted on the shaft 356 of a motor 35.

The head 55 of the shaft 5a of the tool 5 carries two bearings 5; each for a pivot 76 mounted in blocks 7d forming part of the lever 7. These blocks also carry other pivots 7 to which links 36 are connected, whose other ends are connected to cars 32?) sleeve 32 by means of pivots 32d.

YVhen the tool 5 wears, the lever 7 pivots in the clockwise direction round the pivots 7f, which may also describe circular arcswith centres 32d and radii 32d-7f. This oscillating movement of the lever 7 is accompanied by a. similar oscillating movement of an arm 37 pivoting at 32f on the screwed sleeve 32 and connected at 5; with the head 565. This arm 37 fulfills a similar purpose to the oscillating arm 26 in the Figures 1 and 2. Bymeansof'its oscillations, it makes an electric contact with one or other of the contacts 27 interposed in the circuit of the motor 35. In case the tool 5 wears away, the motor 35 is started in a direction such that the sleeve 32 descends. This descent causes the lever 7 to become horizontal, by pivoting in the anticlockwise direction round the pivots 7 and brings the arm 37 into the position in which the current is cut oil". This latter oscillating movement of the lever 7 causes a pinion 39 carried by the lever 7 to roll downwards on a fixed rack 38. Said pinion transmits its motion by gear wheeIs 40 and 41 to a toothed wheel 42 round which passes a chain 43 passing also round a toothed wheel 44 carried by the lever 7. It is evident that the descent of the pinion 39 causes the chain. 43 to be. displaced so that its upper'length 43a, to which of the threaded the weight 8 is fixed, from the shaft 5a.

As in the embodiment shown in Figures land 2, the mechanical connection between moves the latter away the motor 35 and the chain 43 is such that any lowering of the screwedsleeve 32 corresponding to a determined reduction in thickness of the tool 5 causes theweight to be displaced so that the variation of reaction onthe tool 5 be equal to the variation-in the weight of said tool due to said reduction in thickness.

If the tool is to be raised rapidly,-the motor 35 is driven in the suitable direction by manipulating a commutator not shown on'the drawings. The rotation of the motor 35 causes the threaded sleeve 32 to rise, which-by its collar 32a lifts the head 5d of the shaftfi a of thetool.

As in the embodimentshown in Figures 1 and 2, the possibility of turning the shaft. 35?) This shaft may have for instance a square end 35d on whichby hand is provided for a crank maybe fitted,

It is evident that the invention is not exclusively limited to the embodiments shown and'that many alterations may be made-in the shape, the arrangement and the constitution of the parts employed in the embodiment,

without exceedingthe scope-0f this invention.

Thus it is evident that the table 2I-may be rotary or fixed, thatthe cross beams'such as 6 may be displaced parallel to the table2 or 7 may be fixed. Thenumber of tools supported by each beam maybe varied. The devices for regulating the, height of thebeam the height of the screwed sleeve 32 and which displaces the weight 8 may also vary. The

driving power may be other than electricity.

WhatIclaim is: y 3 i 1. Apparatus for grinding, smoothing and polishing plate glass, supporting the glass, glass, apivoting lever connected to each tool, a weight carried by each'lever, means for displacing each weight along each lever, trucks for supporting the beams, inclined planesv on which the trucks rest, and means for displacing the trucks along the slope of the inclined planes. e

2. Apparatus-for grinding, smoothing and polishing plate glass, comprising tables for supporting the glass, tools for treating the glass, a pivoting lever connected to each tool, beams for supporting the .saidlevers, a weight carried by each lever, means for displacing each weight along each lever, trucks for supporting the beams, the trucks rest, nuts mounted in said trucks, screwed rods passing in said nuts in the discrewed rods, and means tively to the beams.

' 3. Apparatus for grinding, smoothing and" polishing plate glass,

comprising tables'for tools for treating the inclined planes on" which comprising tables for a screwed rods, and means for preventing said gaged on eachethreaded sleeve,

screwed rods from displacing axially relatively to the beams, the screwed rods presenting parts screwed in opposite directions in order to cause equal displacements of the trucks.

4. Apparatus for grinding, smoothing and polishing plate glass, comprising tables for supporting the glass, tools for treating the glass, a pivoting lever connectedto each tool, beams for supporting the said levers, a weight carried by each lever, means for displacing each weight along each lever, nuts with vertical axis mounted in said beams, screwed vertical columns passing in said nuts, and meansfor rotating said nuts.

5. Apparatus for grinding, smoothing and polishing plate glass, comprising tables for supporting the glass, tools for treating the glass, a pivoting lever connected to each tool, beams for supporting the said levers, a weight carried by each lever, screwed rods axially immovable relatively to the beams, means for rotating said rods, nuts engaged on said rods, and a mechanical connection between each weight and a corresponding nut for displacing each weight along its lever by the rotation of the corresponding rod.

6. Apparatus for grinding, smoothing and polishing plate glass, comprising tables for supporting the glass, tools for treating the glass, a pivoting lever connected to each tool, beams for supporting'the said levers, a weight carried by each lever, means for displacing each weight along each lever, a-nd means for regulating the height of the pivots of the lever relatively to the beams.

7. Apparatus for grinding, polishing plate glass, supporting the glass, tools for treating the glass, a pivoting lever connected to each tool, beams for supporting the said levers, a weight carried by each lever, means for displacing smoothing and each weight alon each lever, a threaded sleeve for supporting each pivot, a nut enmeans for retating said nuts, and means for preventing these nuts from displacing axially relatively to the beams.

8. Apparatus for grinding, smoothing and polishing plate glass, comprising tables for supporting the glass, tools for treating the glass, a pivot-ing lever connected to each tool, beams for supporting the said levers, a weight carried by each lever, a'chain connected to each weight, toothed wheels mounted on said 7 tools for treating the comprising tables for pivoting levers for carrying the correspond-- ing chain, gear wheels mountedon the corresponding lever ,for [rotating one of said toothed wheels, and, a fixed rack in contact with'one of the said gear wheels.

9. Apparatus for grinding, smoothing and polishing plate glass, comprising tables for supporting the glass, tools for treating the glass, a pivoting lever connected to each tool, beams for supporting the said levers, a weight carried by each lever, means for dis v placing each weight along each lever, means for regulating the height ofithe pivots of the levers relatively to the tables, and a connection between these two meanssuch that the lowering of the pivots corresponding to a determined wear of the tools, causes the weights to be displaced for: an amount such that the variation of the reaction which'thesame exert on the shaft ofthetools is equal to the loss of weight of the tools due to the above named wear; I s

10. Apparatus for grinding, smoothing and polishing plate glass, comprising tables for supporting the glass, tools for treating the glass, a pivoting lever connected to each tool,'beams for supporting the said, levers, a weight carried by each lever, means for displacing each weight along each lever, means for regulating theheight of the pivots of the levers relatively to. the tables, a connection between these two means such that the lowering of the pivots corresponding to a determined wear of the tools, causes the weights to be displaced for an amount such that the variation of the reaction which the same exert on the shaft of the tools is equal to the loss of weight of the tools due to the above named wear, and a disengaging member in the said connection. r a

11. Apparatus for. grinding, smoothing and polishing plate glass, comprising tables for supportlng'theglass, tools for treating the glass, a pivoting lever connected to each tool, beams for supporting the said levers, a weight carried by each lever,a motor for displacing each weight along each lever, a motor for displacing the pivoting pointof said levers so that the latter come back to a horizontal position after a certain inclination due to the wear of the tools, an interrupter in the feeding circuit of the said motors, and means for displacing the said interrupter by the displacementsof the said levers so that the passage; of J power towards the said motors is established when the levers are in an inclined position and is cut oil when the levers are back in a horizontal position. I

12. Apparatus for grinding, v smoothing and polishing plate glass, comprisingtables for supporting the glass, tools for. treating the glass, a pivoting lever connectedto each tool, beams ior supporting the said levers,

a weight carried by eachlever, amotorfor 1-- the driving 2f displacing each weight alongeach lever, a motor for displacing the pivoting point of said levers so that the latter come back to a horizontal position after a certain inclination due to the wear of the tools, an interrupter in the feeding circuit of the said motors, and adjustable abutments mounted on each lever on either side of the said interrupter, the said interrupter being so arranged that it establishes the passage of the driving power towards the said motor when the said levers are in an inclined position and cuts this passage olf when the said levers are back in a horizontal position.

In testimony whereof I ZLfliX my signature.

CHARLES HEUZE. 

